13120720

素因数分解:

$2^4\times 5^1\times {\mathrm{401}}^1\times {\mathrm{409}}^1$

素因数の和:823

約数の個数: 40

約数和(自身を含む): 30656520

約数和(自身を除く): 17535800

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 401, 409, 802, 818, 1604, 1636, 2005, 2045, 3208, 3272, 4010, 4090, 6416, 6544, 8020, 8180, 16040, 16360, 32080, 32720, 164009, 328018, 656036, 820045, 1312072, 1640090, 2624144, 3280180, 6560360, 13120720]

約数ペア:

[(1, 13120720), (2, 6560360), (4, 3280180), (5, 2624144), (8, 1640090), (10, 1312072), (16, 820045), (20, 656036), (40, 328018), (80, 164009), (401, 32720), (409, 32080), (802, 16360), (818, 16040), (1604, 8180), (1636, 8020), (2005, 6544), (2045, 6416), (3208, 4090), (3272, 4010)]